Thank you for sharing! I didn’t think this was possible on 3DS hardware.
I’m still having issues getting it to work, though. I shut off NVIDIA GameStream in favor of Sunshine and made sure all the required ports are open on my PC. But when trying to pair to PC, the first time I get a PIN it immediately fails, saying something about the URL being illegal. If I try again, get another PIN, and enter that into Sunshine, nothing happens. More annoying, at most stages of the process, Moonlight soft locks my 3DS and it can’t even quit the app from the Home button, forcing me to hold the power button until it turns off.